Document zQOv14YvOX3zL9B6yXb0xVx3R

PHILADELPHIA 20, PA. ADDRESS ALL COMMUNICATIONS TO THE COMPANY May 3, 1945 Dr. Cecil K. Drinker Harvard University 55 Shattuck Street Boston 15, Mass. Dear sir: In response to your letter of April 24, 1945, we have had Kirksite analyzed and find that it.contains the following: 3*20$ copper 5.08$ aluminum 91.50$ zinc With these facts, could you answer the following questions for us regarding Kirksite: 1. Will working continuously with this material expose the worker to danger of contracting lead or metal poisoning? 2. Does dust from grinding or filing of this material have any effect on respiratory system? 3. Do you believe the wearing of protective respiratory equipment when grinding this material should be compulsory? 4. Could this dust cause permanent impairment to the worker's vision? YVMQU j cause irritation of the skin? Dermatitis? We^WiTl greatly appreciate your help in this matter. <r. : Very truly yours, GED:r G. Edward Deming, 0f. ^ Assistant Personnel Manager